diff --git a/src/model_physics.rs b/src/model_physics.rs
index fe64ec8..243c473 100644
--- a/src/model_physics.rs
+++ b/src/model_physics.rs
@@ -757,7 +757,7 @@ impl MinkowskiMesh<'_>{
 			//WARNING! d outside of *2
 			//WARNING: truncated precision
 			for dt in Fixed::<4,128>::zeroes2(((n.dot(relative_body.position))*2-d).fix_4(),n.dot(relative_body.velocity).fix_4()*2,n.dot(relative_body.acceleration).fix_4()){
-				if dt.num.is_positive()&&dt.lt_ratio(best_time)&&n.dot(relative_body.extrapolated_velocity_ratio_dt(dt)).is_negative(){
+				if Ratio::new(Planar64::ZERO,Planar64::ONE).le_ratio(dt)&&dt.lt_ratio(best_time)&&n.dot(relative_body.extrapolated_velocity_ratio_dt(dt)).is_negative(){
 					best_time=dt;
 					best_edge=Some(directed_edge_id);
 					break;